How to create an computationally efficient fan or sheet of light in Cycles?

by DarenW   Last Updated August 03, 2018 19:15 PM

I want a light source to put out a sheet or fan of light. It would illuminate only along a line if it were shining on a flat surface. But I want to shine this on complex shapes.

One way I've tried is to put a point light or emitting object between two closely spaced parallel planes. It can cast a line of light if I crank up the sample count to several thousand, but it's noisy, not well collimated, and of course slow. This is for an animation.

Tags : light


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